<template>
  <div class="app-container">
    <el-row :gutter="10" class="mb8">
      <el-col :span="1.5">
        <el-button type="primary" plain icon="Upload" @click="handleImport">导入</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button type="warning" plain icon="Download" @click="handleExport">导出</el-button>
      </el-col>
      <right-toolbar></right-toolbar>
    </el-row>

    <el-table :data="categoryList" v-loading="loading" style="width: 100%" row-key="id" border lazy :load="fetchData"
      :tree-props="{ children: 'children', hasChildren: 'hasChildren' }">
      <el-table-column prop="name" label="分类名称" />
      <el-table-column prop="imageUrl" label="图标" #default="scope">
        <img :src="scope.row.imageUrl" width="50" />
      </el-table-column>
      <el-table-column prop="orderNum" label="排序" />
      <el-table-column prop="status" label="状态" #default="scope">
        {{ scope.row.status == 1 ? '正常' : '停用' }}
      </el-table-column>
      <el-table-column prop="createTime" label="创建时间" />
    </el-table>

    <!-- 商品类别导入对话框 -->
    <el-dialog :title="upload.title" v-model="upload.open" width="400px" append-to-body>
      <el-upload ref="uploadRef" :limit="1" accept=".xlsx, .xls" :headers="upload.headers"
        :action="upload.url + '?updateSupport=' + upload.updateSupport" :disabled="upload.isUploading"
        :on-progress="handleFileUploadProgress" :on-success="handleFileSuccess" :auto-upload="false" drag>
        <el-icon class="el-icon--upload"><upload-filled /></el-icon>
        <div class="el-upload__text">将文件拖到此处，或<em>点击上传</em></div>
        <template #tip>
          <div class="el-upload__tip text-center">
            <div class="el-upload__tip">
              <el-checkbox v-model="upload.updateSupport" />是否更新已经存在的类别数据
            </div>
            <span>仅允许导入xls、xlsx格式文件。</span>
            <el-link type="primary" :underline="false" style="font-size:12px;vertical-align: baseline;"
              @click="importTemplate">下载模板</el-link>
          </div>
        </template>
      </el-upload>
      <template #footer>
        <div class="dialog-footer">
          <el-button type="primary" @click="submitFileForm">确 定</el-button>
          <el-button @click="upload.open = false">取 消</el-button>
        </div>
      </template>
    </el-dialog>
  </div>
</template>

<script setup name="Category">
import { getToken } from "@/utils/auth";
import { getTreeSelect } from '@/api/product/category'
const { proxy } = getCurrentInstance();

console.log('填充一级类别')
const categoryList = ref([])
const loading = ref(true)

//加载一级类别
function getList(id) {
  loading.value = true
  getTreeSelect(id).then((response) => {
    categoryList.value = response.data
    loading.value = false
  })
}


//数据列表：同步调用
//resolve：函数类型的参数
//  const fetchData = async (row, treeNode, resolve) => {
//   console.log('填充二级类别')
// 向后端发送请求获取数据
//   const { data } = await getTreeSelect(row.id)
// 返回数据：子节点渲染
//   resolve(data)
// }

//数据列表：异步调用
function fetchData(row, treeNode, resolve) {
  getTreeSelect(row.id).then(response => {
    resolve(response.data)
  })
}


/** 导出按钮操作 */
function handleExport() {
  proxy.download("product/category/export", {}, `category_${new Date().getTime()}.xlsx`);
}


/*** 用户导入参数 */
const upload = reactive({
  // 是否显示弹出层（用户导入）
  open: false,
  // 弹出层标题（用户导入）
  title: "",
  // 是否禁用上传
  isUploading: false,
  // 是否更新已经存在的用户数据
  updateSupport: 0,
  // 设置上传的请求头部
  headers: { Authorization: "Bearer " + getToken() },
  // 上传的地址
  url: import.meta.env.VITE_APP_BASE_API + "/product/category/importData"
});
/** 导入按钮操作 */
function handleImport() {
  upload.title = "商品类别导入";
  upload.open = true;
};
/** 下载模板操作 */
function importTemplate() {
  proxy.download("product/category/importTemplate", {
  }, `category_template_${new Date().getTime()}.xlsx`);
};
/**文件上传中处理 */
const handleFileUploadProgress = (event, file, fileList) => {
  upload.isUploading = true;
};
/** 文件上传成功处理 */
const handleFileSuccess = (response, file, fileList) => {
  upload.open = false;
  upload.isUploading = false;
  proxy.$refs["uploadRef"].handleRemove(file);
  proxy.$alert("<div style='overflow: auto;overflow-x: hidden;max-height: 70vh;padding: 10px 20px 0;'>" + response.msg + "</div>", "导入结果", { dangerouslyUseHTMLString: true });
  getList(0);
};
/** 提交上传文件 */
function submitFileForm() {
  proxy.$refs["uploadRef"].submit();
};

//加载一级类别
getList(0)


</script>